[background technology]
Along with constantly popularizing of display panels, more and more higher to the requirement of display panels display quality.
Refer to Fig. 1, Fig. 1 is the dot structure schematic diagram of display panels in a kind of prior art, above-mentioned display panels comprises 2m bar data line D'1 ~ D'2m(data line), 2k bar sweep trace G'1 ~ G'2k(Gate line), grid drive chip 11 and source driving chip 12, above-mentioned data line and the mutual cross arrangement of sweep trace, grid drive chip 11 connects sweep trace, source driving chip 12 connection data line, two data lines adjacent one another are and the intersection region of adjacent one another are two sweep traces form a pixel cell (non-label), one thin film transistor (TFT) and a liquid crystal capacitance (not shown) are set in each pixel cell, and the pixel cell corresponding R pixel respectively of each row, G pixel and B pixel.
The gray scale voltage wherein transmitted on data line (D'1 ~ D'2m), with common electric voltage Vcom as the reference voltage, positive polarity gray scale voltage, negative polarity gray scale voltage and 0 polarity gray scale voltage can be divided into, positive polarity gray scale voltage refers to that its voltage is higher than common electric voltage Vcom, negative polarity gray scale voltage refers to that its voltage is lower than common electric voltage Vcom, and 0 polarity gray scale voltage refers to that its voltage equals common electric voltage Vcom.When same grey decision-making represents with positive polarity gray scale voltage and negative polarity gray scale voltage respectively, display effect is consistent in theory.
In the structure of the display panels shown in Fig. 1, the wherein data line being in centre (namely not in both sides) can be connected to the pixel cell of the left and right sides by between-line spacing, use this kind of structure can realize row reversion (column inversion) and some reversion (dot inversion).
More specifically, in R pixel, G pixel and B pixel, when when display frame is two adjacent row pixels, other row are dark, for example to show blue picture, now G pixel and pixel column input gray scale voltage corresponding to B pixel, and pixel column corresponding to R pixel inputs 0 gray scale voltage, the signal voltage wherein sent into refers to Fig. 2, owing to showing blue picture, therefore R pixel is entirely dark, therefore the polarity of the pixel cell of R pixel respective column is 0; G pixel and B pixel are on state of, and according to the type of drive of flip-pixel, and G pixel and polarity corresponding to B pixel are positive and negative staggered, and picture can drive in a mode for reversion thus.
In specific implementation process, because sweep trace scans line by line in order, once the sweep signal of sweep trace opens the thin film transistor (TFT) of pixel cell, then gray scale voltage is inputed to this thin film transistor (TFT) by data line.For example refer to the signal wire waveform shown in Fig. 3, what data line D'2 was corresponding is 0 cycle signal, and the G pixel that data line D'3 connects and B pixel are entirely positive signal, and data line D'4 is negative cycle signal.Because signal wire (comprising sweep trace and data line) itself exists voltage drop (RC loading), cause the end charge efficiency of data line D'2 and data line D'4 to be bound to lower than initiating terminal, and then cause the charge efficiency of being carried out the pixel cell charged by same data line inconsistent; The pixel corresponding to it and data line D'3 is direct current signal due to what send, the delay of signal can not be there is, so well can complete charging.
Return Fig. 3, above-mentioned charging modes will cause in same row, and the charge efficiency of each pixel cell is inconsistent, and having brightly has dark situation, and whole picture will occur the bright concealed wire of level at the output terminal of signal wire.
[summary of the invention]
The object of the present invention is to provide a kind of display panels and driving method thereof, there is voltage drop due to signal wire in purport in the prior art, causes the charge efficiency of pixel inconsistent, and then makes display panels occur the technical matters of the bright concealed wire of level.
For solving the problems of the technologies described above, the present invention constructs a kind of display panels, comprise many data lines along column direction extension and many sweep traces extended in the row direction, described data line and the mutual square crossing arrangement of described sweep trace, two adjacent data lines and adjacent two sweep traces intersect to form a pixel cell, are provided with a thin film transistor (TFT) in each pixel cell above-mentioned;
The pixel cell being wherein positioned at same a line connects the data line of the same side; And in two adjacent row, two adjacent pixel cells of order connect the data line of both sides respectively;
Described display panels also comprises drive element of the grid and source drive unit, described drive element of the grid, be electrically connected described multi-strip scanning line and input sweep signal according to the first preset order, under described first preset order, described drive element of the grid is to input sweep signal in compartment of terrain between described many each horizontal scanning lines;
Described source drive unit is electrically connected described a plurality of data lines and according to the second preset order input gray scale voltage, under described second preset order, described source drive unit inputs gray scale voltage to described many along the data line compartment of terrain that column direction extends.
For solving the problems of the technologies described above, the present invention have also been constructed a kind of driving method of display panels, said method comprising the steps of:
Drive element of the grid is according to the first preset order input sweep signal, and under described first preset order, described drive element of the grid is to input sweep signal in compartment of terrain between described many each horizontal scanning lines;
Source drive unit is according to the second preset order input gray scale voltage, and under described second preset order, described source drive unit inputs gray scale voltage to described many along the data line compartment of terrain that column direction extends.
The embodiment of the present invention is when driving signal wire, by signal wire (such as sweep trace and data line) interval input signal or gray scale voltage, avoid in three row pixel cells of continuous adjacent, wherein two row pixel cells be shown as on state of and another pixel cell is shown as dark-state time, due to signal wire have that voltage drop causes inconsistent to the charge efficiency of each pixel cell, and then cause picture to occur the problem of the bright concealed wire of level at the output terminal of signal wire, improve the picture display effect of display panels.
For foregoing of the present invention can be become apparent, preferred embodiment cited below particularly, and coordinate institute's accompanying drawings, be described in detail below:
[embodiment]
The explanation of following embodiment is graphic with reference to what add, can in order to the specific embodiment implemented in order to illustrate the present invention.The direction term that the present invention mentions, such as " on ", D score, "front", "rear", "left", "right", " interior ", " outward ", " side " etc., be only the direction with reference to annexed drawings.Therefore, the direction term of use is in order to illustrate and to understand the present invention, and is not used to limit the present invention.In the drawings, the unit that structure is similar represents with identical label.
Refer to Fig. 4, Fig. 4 is the structural representation of present pre-ferred embodiments display panels.
Above-mentioned display panels comprises multiple pixel cell, and 2m bar data line D1 ~ D2m and 2k bar sweep trace G ~ G2k, also comprises drive element of the grid 41 and source drive unit 42.Wherein, drive element of the grid 41 connects sweep trace, source drive unit 42 connection data line, described data line and the mutual square crossing arrangement of described sweep trace.Be not difficult to find out from Fig. 4, adjacent two data lines and adjacent two sweep traces intersect to form a pixel cell (non-label).One thin film transistor (TFT) and a liquid crystal capacitance (not shown) are set in each pixel cell.Described drive element of the grid 41 by sweep trace for pixel cell provides sweep signal, described source drive unit 42 by data line for pixel cell provides gray scale voltage.
In embodiments of the present invention, be arranged in the pixel cell of same a line, the source electrode of the thin film transistor (TFT) of each pixel cell connects the data line of the same side; And in two adjacent row pixel cells, the source electrode along the thin film transistor (TFT) of adjacent two pixel cells of column direction order connects the data line of both sides respectively; And the grid of the thin film transistor (TFT) of every a line pixel cell all connects the sweep trace of corresponding row.Specifically refer to Fig. 4, source electrode connection data line D2, D3 respectively of the thin film transistor (TFT) of the pixel cell that M1 is capable Source electrode then connection data line D1, D2 of the thin film transistor (TFT) of the pixel cell that M2 is capable ..., source electrode connection data line D2, D3 respectively of the thin film transistor (TFT) of the pixel cell that M3 is capable ..., the like.
Described in the embodiment of the present invention, drive element of the grid 41 is electrically connected described multi-strip scanning line and inputs sweep signal according to the first preset order, wherein under described first preset order, described drive element of the grid 41 is to input sweep signal in compartment of terrain between described many each horizontal scanning lines; Described source drive unit 42 is electrically connected described a plurality of data lines and inputs gray scale voltage according to the second preset order, wherein under described second preset order, described source drive unit 42 inputs gray scale voltage to described many along the data line compartment of terrain that column direction extends.
Concrete, the embodiment of the present invention is mainly used in following situation: in the pixel cell row that adjacent R pixel, G pixel and B pixel are corresponding, and display frame is that two row pixel cells are on state of and an other row pixel cell is dark-state.For example, to show blue picture, now, in the diagram, G pixel and pixel cell corresponding to B pixel are classified as on state of, need input positive polarity or negative polarity gray scale voltage, and pixel cell corresponding to R pixel is classified as dark-state, needs input 0 gray scale voltage.For realizing above-mentioned effect, described first preset order in the embodiment of the present invention comprises: within a scan period, and described drive element of the grid 41 first to the sweep trace input sweep signal of odd-numbered line, then inputs sweep signal to the sweep trace of even number line.Certainly, in specific implementation process, also can be that wherein two horizontal scanning lines are as a scanning element, described drive element of the grid 41 interval scan unit input sweep signal, enumerate herein afterwards.
Concrete, described second preset order comprises: within a scan period, and described source drive unit 42 first to the data line input gray scale voltage of odd column, then inputs gray scale voltage to the data line of even column.Certainly, in specific implementation process, also can be two column data lines as a data cell, the gray scale voltage of described source drive unit 42 interval data unit input afterwards, does not enumerate herein.
Refer to Fig. 5, Fig. 5 is the voltage oscillogram of display panels shown in Fig. 4 when adopting some inversion driving method on segment data line.Wherein, the gray scale voltage that data line provides comprises positive polarity gray scale voltage (namely voltage is higher than common electric voltage Vcom), negative polarity gray scale voltage is negative polarity (namely voltage is lower than common electric voltage Vcom) and 0 gray scale voltage (voltage equals common electric voltage Vcom).
For example for Fig. 4 and Fig. 5, in one-period T, in order to show blue picture, need by G pixel and B pixel corresponding pixel cell row be shown as on state of, pixel cell row corresponding to R pixel are shown as dark-state, and the driving method of the point of the display panels of embodiment of the present invention reversion is as follows:
First, when front T/2, the sweep trace G2k-1 of odd-numbered line opens, and provides sweep signal, and the thin film transistor (TFT) of the pixel cell that G2k-1 is capable is opened.Now, the data line D2k-1 of odd column inputs gray scale voltage.For example, sweep trace G1, G3 open, and data line D3, D5 input gray scale voltage, and now data line D3 provides the gray scale voltage of positive polarity to corresponding G pixel cell; Data line D5 provides 0 gray scale voltage to corresponding R pixel cell; For example sweep trace G1 and the cross-coupled pixel cell of data line D3 (G pixel) are written into positive polarity gray scale voltage, and sweep trace G3 and the cross-coupled pixel cell of data line D3 (G pixel) are written into positive polarity gray scale voltage, the like.
Afterwards, when rear T/2, the sweep trace G2k of even number line opens, and provides sweep signal, and the thin film transistor (TFT) of the pixel cell that G2k is capable is opened.Now, the data line D2k of even column inputs gray scale voltage, such as sweep trace G2, G4 open, and data line D2, D4 input gray scale voltage, and now, data line D2 provides the gray scale voltage of negative polarity to corresponding G pixel cell; Data line D4 provides 0 gray scale voltage to corresponding R pixel cell; For example sweep trace G2 and the cross-coupled pixel cell of data line D2 (G pixel) are written into negative polarity gray scale voltage, and sweep trace G4 and the cross-coupled pixel cell of data line D4 (R pixel) are written into the gray scale voltage of 0 polarity, the like.By above-mentioned type of drive, the polarity of the pixel cell row that R pixel is corresponding is 0, for complete dark; The polarity of G pixel and pixel cell row corresponding to B pixel is positive polarity or negative polarity, and positive and negative staggered, is on state of; Picture can drive in a mode for reversion thus, and shows blue picture.
To sum up, in the embodiment of the present invention, sweep trace, when inputting sweep signal, within a scan period, first inputs the sweep signal of odd-numbered line, inputs the sweep signal of even number line afterwards again; Meanwhile, data line first inputs the data-signal of odd column, inputs the data-signal of even column afterwards again.Waveform due to input only just has the conversion of polarity when odd-numbered line is switched to even number line, other times all carry out the transmission of signal in the mode of direct current, therefore can reduce because RC loading causes picture element charge rate to occur the phenomenon of difference, ensure that all pixel cell charge rates roughly maintain an average level, and then eliminate the level bright concealed wire of display panels when showing.
Refer to Fig. 6, the schematic flow sheet of the driving method of the display panels that Fig. 6 provides for the embodiment of the present invention.
In step s 601, drive element of the grid is according to the first preset order input sweep signal, and wherein under described first preset order, described drive element of the grid is to input sweep signal in compartment of terrain between described many each horizontal scanning lines.
In step S602, source drive unit is according to the second preset order input gray scale voltage, and wherein under described second preset order, described source drive unit inputs gray scale voltage to described many along the data line compartment of terrain that column direction extends.
More excellent, input described sweep signal at described drive element of the grid according to the first preset order, described source drive unit is when inputting described gray scale voltage according to the second preset order, the pixel cell of described display panels presents following state: in three row pixel cells of continuous adjacent, wherein two be classified as on state of, and other one is classified as dark-state.For reaching above-mentioned effect, described first preset order of the embodiment of the present invention comprises: within a scan period, and described drive element of the grid first to the sweep trace input sweep signal of odd-numbered line, then inputs sweep signal to the sweep trace of even number line.And described second preset order comprises: within a scan period, described source drive unit first to the data line input gray scale voltage of odd column, then inputs gray scale voltage to the data line of even column.
Certainly, in specific implementation process, above-mentioned steps S601 and step S602 synchronously carries out.
Detailed description about described display panels refers to Fig. 4, described display panels comprises many data lines along column direction extension and many sweep traces extended in the row direction, described data line and the mutual square crossing arrangement of described sweep trace, two adjacent data lines and adjacent two sweep traces intersect to form a pixel cell, are provided with a thin film transistor (TFT) in each pixel cell above-mentioned; The grid of the thin film transistor (TFT) of every a line pixel cell all connects the sweep trace of corresponding row.The pixel cell being wherein positioned at same a line connects the data line of the same side; And in two adjacent row, two adjacent pixel cells of order connect the data line of both sides respectively.
The embodiment of the present invention is when driving signal wire, by signal wire (such as sweep trace and data line) interval input signal or gray scale voltage, avoid in three row pixel cells of continuous adjacent, wherein two row pixel cells be shown as on state of and another pixel cell is shown as dark-state time, due to signal wire have that voltage drop causes inconsistent to the charge efficiency of each pixel cell, and then cause picture to occur the problem of the bright concealed wire of level at the output terminal of signal wire, improve the picture display effect of display panels.
In sum; although the present invention discloses as above with preferred embodiment; but above preferred embodiment is also not used to limit the present invention; those of ordinary skill in the art; without departing from the spirit and scope of the present invention; all can do various change and retouching, the scope that therefore protection scope of the present invention defines with claim is as the criterion.